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Financial Statements Details - Warranty Accrual (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Warranty [Roll Forward]    
Warranty accrual, beginning of period $ 9,314 $ 6,742
Liabilities accrued for warranties issued during the period 8,643 4,507
Warranty costs incurred during the period (8,429) (4,517)
Warranty accrual, end of period $ 9,528 $ 6,732